Jennifer Garner has gone undercover to attend a screening of her new movie 'Peppermint'.

The 46-year-old actress stars as a mother whose husband and daughter are killed in a drive-by shooting in the new action film, and Jennifer has revealed she recently attended a cinema in Los Angeles, where she sat alongside regular moviegoers.

Jennifer documented the experience on her Instagram account, captioning a video: ''The studio encouraged me to go to the theater and see #PEPPERMINTmovie with an audience-- maybe they thought I would conduct exit polls? But I learned something about myself on this experiment-- I am a chicken. Thank you to everyone who spent their weekend and their hard earned money with #RileyNorth and me. [love heart emoji] If you go this week-- you never know-- I may be lurking behind a curtain at a theater near you. (sic)''

Earlier this month, Jennifer revealed she embraced ''mom rage'' for her latest role.

The 46-year-old actress - who has kids Violet , 12, Seraphina, nine, and Samuel, six, with ex-husband Ben Affleck - plays a vengeful mother in 'Peppermint', and Jennifer admitted she relied on some aspects of her real-life self for the role.

She explained: ''There's something about making this movie that plays out every bit of mom rage you've ever had on the playground or every bit of mom rage you've ever had, like, when your child is put in the back of a class and you feel they should be in the front. Or their feelings are hurt.''